Wire terminal



Aug; 3, 1943. F. c. LAVARACK ET AL WIRE TERMINAL Filed July 2, 1941INVENTORS awd s M Patented Aug. 3, 1943 UNITED STATES PATENT orr es I 0,1

WIRE TERMINAL- 7 Frederick o. 'Lavarack, Montclair, N. 1., an i I,Edward M. Deems, ForestHills,jN. Y., assighors t0 Railroad AccessoriesCorporation, New York, N. Ya-a corporation of New York; a a

Application July 2, 1941, serial o. 40 0, 782 2 Claimsf (01.,173-269)This invention relates to .wire terminals'or eye lets. 7 p Aprimary'object of this invention is the production oia device of theclass specified which will exhibit the desired characteristics of knownwireterminals or eyelets and in addition will pro vide means foraccurately positioning the end of the insulation of. a bared endinsulating wire.

A further objector the invention i to provide a device of the typespecified with the features as hereinbefore specified and in additionaffording a much stronger structure in that portion where in knowneyelets are most weak.

Other objects and advantages will a pear. as

the description of the particular physical embodi ment selected toillustrate thefinvention pros gresses, and the. novel features'will beparticularly pointed out in the appended claims.

In describing the invention in' detail, reference will be had to theaccompanying drawing and the several views thereon,-inwhich similarcharacters of reference designate like parts throughout the severalviews, and in which: 7

Figure 1 is a top plan view of an eyelet of applicants invention withthe bared end of an in sulated electric conductor secured therein; Fig.-2 is an illustration of-the device of Fig. 1 as applied 1 to a wellknown type of electric conducting binding post; Fig. 3 is across-sectional view of thede vice as shown by Fig. 1.0n the planeindicatedby the line III-III of Fig. 1, viewed in the direction 1 of thearrows at the ends ofthe line; Fig. 4 is a f cross-sectional view of thedevice" as shown by Fig. 3 on the plane indicated by the line IV-YIV,

viewed in the direction of the arrews. at the ends of the line; Fig. 5is a cross-sectional viewof the.

device as. shownby Fig. 1. on the plane indicated by the line l/'-V ofFig. 1,,viewedjnthe direction of the arrows at the ends of the line;Fig. '6 is a side elevational view of the device as shown by 1 before ithas been applied to the end of an insulated conductor but with a partbroken away a single piece ofmaterial and may be designated V as a wholeas shown in Fig. 9, by E.

x The eyelet of applicants invention comprises a single bodyofconducting material, preferably copper or brass and preferably tinned.i The eyelet includes a substantially circula body I, formed with asubstantially semi-circular channel 2. At one end of the channel 2 thereis a throat 3.. .The throat 3 is bent into substantially a right angleproviding a shoulder i.

Extending beyond'the shoulder 4 is substantially a U member 5, the curve6 of Whichtelfjminate at the shoulder and the legs of which extend alongtheshoulder and substantially beyond the shoulder in a direction ataright angle because on each of opposite. sides of the throat a.

somewhat righ't angle wall extends from the throat terminating atone endI asshownby Fig. 6 somewhat adjacent to and merging with a leg -as Biofth? .U, and then proceeding by-a shallow curve toabout-one quarter ofthe way around the body. .I, as atabout the point 9Qwhere it merges withtheouter; edge of the channel. These resistor Walls on each of oppositesides of the throat provide what is practically a: resistor to bending.Iofthe throatiin a plan substantially at a right angle to thesgeneral.plane of the channel; In practice," it, has been found'thatithisadditional f eature'of construction over known wire eyelets to moreclearly show the internal constructiony,

Fig. 7 is a right hand end View of the device as shown by Fig. 6; Fig. 8is a left hand end view of the device as shown by Fig. 1 but showing bydotted lines certain parts before. compression; Fig. 9 is a perspectiveview of the device as shown bylFig, 6.

Wire terminals or. eyelets are eld and well known in the electrical art.l Wire eyelets of the general form of applicants eyelet are old and wellknown in the electrical art. Applicants eyelet is an improvement ofknown eyelet arrived at by observation of the action. of

known eyelets in use, andacquaintance with the defects of known eyeletsand conception of a means for overcoming the more prominent defects.

The eyelet of applicants invention'is made of H is of immense advantageandof great efiic'iencyin that it"greatly prolon s the life'of theterminal in that it preventsbreaking of the terminal through thethroat3.

Another defect ofknown terminals hasarisen .irorh the fac't'that one ormore strands'of the stranded conductor when placed within the channel 2wouldescape therefrom by reason of Y mean that the means for holding thestrands in the channel metthefree edge of thclchan'nel directly Inapplicants construction, there is provided an annulus l 0 around theinneredge ofthe chanin applicantsconstruction jthe edge [2 of the neland this 'annulusis provided at its fr'eeedge with a flange ii. QfThisannulus l9 and flange, I i are adapted to be compressed andsurround-astranded conductor, as best'shown in Fig. 5, but

annulus ll passes beyond the free edge l3 of the channel and. therebyquite insures against any I face. squeezed down into-place,ifithere'fiis any surplus wire extending attire point I E 'th'atis notwantsingle strand of the conductor Working out from beneath. the. flangeandbeyondthe tree edge 13 of the channellto perhaps touch an adjacentconducting binding post or terminal and so cause an undesired circuit tobe formed.

In practice, an insulated conductor, as M, is

bared of its insulation for a relatively shortfdi'se tance at one endand the strandsnthereoil are di vided into substantially "two equalportions;

Then the insulating materiahisf laicl intof the curve 6 of the U withthe end thereof abutting the shoulder ithereby accurately positioningit.

After being so positioned, the I'egsof the U dare and "squeezed intoplace, as best shown in 4,

Wrapped about the insulating material forming substantially an annuluswhich securely holds the conductor positions-Lit properly against theshoulder i so that, it. not ride up on-the throats and cause: detects:,Thadivide'd ends of the conductor arepassed; one aroundone side-and theother around the'other: side andin the channelfi 5;, as best shown inFig. ii The ends-of the two, portions are generally tWi-StEdItO getherasat S52 Theannuihsltdwiththe flange l l is then squeezed downinto-place. asgshown-i'n Figure-8i by ful'l'lines; Asshowrr-by v-5,.whenannulus has been so: squeezed down the end of the flange- IE and; thefree encl iii of the chi-n14 nel pass one another but" notlmeetxiacc toAfter the annulus it and flange I iii are ed; it may be cut ofi-Z" j Inorder toprevenjt' any interference w'itli the squeezing down of theflangeit at th'e p o t wh re 'the errds' l 5 come together; notches, oneit; inllhe flange H" and the other; H, in-thebody l, are formed toreceive the bared'ends of the conductor in such-a way that theywil'ln'ot interfere with the squeezing down of the annulus no flange Theelectrical conductor with its endprov- I wane terminal asd'escribedn-Iay then' be placed over a binding post as 5 8andsecurelyheId down thereon bya washer as ii and a nut Applicants havefurther provided against any interference with the squeezing down of theannulus: HI and flange i i-by terminating the-an} nulus and flange at apoint adjacentthet'hroat' 3. This; termination is suclrthat itwouldappear as? though the annuiusaand flange lrawe rbeen out away along. aplane ata right angle tothe gene ena l: plane of the body-t passingthrough a point just? within. the ,inner circle of thachannela ad"jiacent the threat, that is; on. plane passed through line hiat-a rightangletd the sheetup on which the drawing is: made; Byouttingthe annulusand flange along the -plane'-designated; sharp: points have been avoidedat the points: 22. and 23 which inthepast have been found tobetroublesome in those cases Where the flange, such as H, has been cutoffon what might be cor:-

7 What We claim as new and desire to secure by Letters. Patent. of theUnitedStates, is:

1. A single piece eyelet connector for a conducting 'wire, comprising incombination: an

electrical conducting body of general circular outline formed with asubstantially semi-circular .Jchannel, a throat projectinglradiallytherefrom, U formed in extension of the throat, said throat on each sideprovided with a right angle wall extendingirom adjacent and merging withthe extreme free-end of a leg of the U in a shallow curve only about thedistance of the throat around to anouter edge of and merging with thechannel serving as a resistor to bending of the throat in a planesubstantially at a right angle to th'e gene raI-pl'ane'of the channeland means for securing an electrical conducting Wire in the saidchannel, the legs of said being adapted to-be wrapped fromopposite sidesabout the insulation of acond'uctor forming substantially a closelyfittingannulusthereabout.

21A single piece eyelet connector 'for'an insulation' coverstrandedelectrical conducting Wire, having the insulation removed forarelatively sliort distance at the extreme end,' comin combination:anel'ectrioalconducting body of general circular outline formed with asubstantially semi ci'rcul'arolrannel', a throat projecting'radiallythrefrommaid throat includmg a right angle bendtherein forming ashoulder-adapted to abutthe end of insulation of a bared" conductor,said throat beyond'the shoulder being formed into a- U', the curve ofwhich terminates at the shoulderand the legsof which extend along andsubstantially beyondthe shoulcler in a direction at a right angle to thegeneral plane of the channel, said legs adapted to' be wrapped fromopposite sides about the insulation of a conductor forming substantiallya closely fitting annulus thereabout', said throat oneach side providedwith a somewhat right angle wall extending fro nadjacen t' and mergingwith the extreme free end ofa leg of the U in a shallow curve about the,distance of the throat around fihfi outer edge: of and mergingwith thechang lservingas aresistor to bending'of the throat in a planesubstantially at a right .angleto the general plane oi'the channel, saidchannel formed onitsinner edge with an annulus extending at a rightangle to the general plane of the channel,

said annulus provided Witlrja fiangeat its free end,'-said flange andannulus beingv continuous except for aportion adjacent the throat end ofthechanne'l where the flange and annulus are formed" as though severed.along a plane at a right angle to the general plane of the channel,

said plane being positioned just iorward of the innersurface ofthechanneladj'acent the throat,

said flange and channel at a point most remote from the throatbeing'formed each with a notch adapted to allow protrusion or" the endsof a conductor lying in the channel, said annulus and flange'a-daptecltabs-squeezeddown upon the end of a conductor divided andone portionpassing around one side of the channelflan'd the other portion aroundthe other sidear'rd when entirely squeezed down having the edge of theflange lying entireiy Within'the channel and its edgebelow thefree edgeof the channel.-

FREDERICK C. LAVARACK. EDWARD DEEMS

